Design and performance tests of an efficient sample preparation system for AMS-14C dating

To achieve effective sample preparation for AMS-14C dating, an improvement on automated AAA treatment system has been carried out. The new method is in particular useful for the preparation of charred materials on potsherds on which we are mainly focused. An additional carbon extraction and graphitization system with elemental analyzer was also introduced in National Museum of Japanese History. These systems work properly with little memory effect and sufficient blank level.